When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
The cat brain weighs about 30g.
167
When you shave a guinea pig it looks like a little hippo.
19
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2